2001 Civic P1361 code at start up

This Civic starts fine, runs good but, at least 3 or 4 times during warm up, it’ll kick up a P1361 code and go into limp mode. Reset it and it runs fine. Once it gets to full, normal operating temperature it runs fine and doesn’t set the P1361 code any longer. New OEM cam and crank sensors, checked wiring, replaced cam sensor plug. New cylinder head and cam, new timing belt, tensioner and water pump. New plugs and coils. New drive belts. New alternator. New O2 sensors. New cataltic converter and exhaust system. Car runs and drives great after it gets to normal operating temp. Took it to Honda. They had it for 3 days, couldn’t figure it out. Completely baffled.